Feeder for sewing-machines.



No. 708,63l.

C. FRSTER. FEEDER FOB SEWING MACHINES- Patented Sept. 9, |902.

(Application led Dec. 9, 190151 2 Sheets-Sheet I.

(No Model.)

m iti-ll: f

utyoast. Patented sept. 9, |902.

C. FRSTER. f FEEDER FDR SEWING MACHINES.

(Application med new 9, 1901.)

` (No Model.) 2 Sheets--Sheef 2.

nel? F659 Heft? jm: Norms Prrzns co, PNOTQLWHU. WASHINGTON n c UNITEDSTATES i PATENT EEICE.

CARL EESTEE, or GAELONZ, AUSTRIA-HUNGARY.

FEEDER FOR SEWING-MACHINES.

SPECIFICATION forming part of Letters Patent N o. '708.631, datedSeptember 9, 1902.

Application filed December 9, 1901. Serial No. 85,238. (No model.)

T0 ctZZ whom, it may concern:

Be it known that l, CARL' FRSTER, 'a subject of the Emperor ofAustria-Hungary, residing at 5 Bismarckplat-z, Gablonz, in the Kingdomof Bohemia and Empire of Austria- Hungary, have invented new and usefulImprovements in Feeders for Sewing-Machines, of which the following is aspecification.

My invention relates to an improved feeder for sewing-machines, theessential feature of which is that a feeder-bar having inclinedbearing-faces for operating the feeder proper will in its movement inthe longitudinal direction displace the feeder both horizontally andvertically at right angles to the direction of such movement.

On the accompanying drawings I have represented a chain-stitchsewing-machine designed to be worked by hand and furnished with theimproved feeder; but the invention may also be applied to other'kinds ofsewingmachines.

Figure lis a side elevation of the sewingmachine, some parts of the samebeing shown in section. Figs. 2 to 6 are front views, plans, and sideviews, respectively, showing different positions of the needle andfeeder.

Upon a base a, an arm b is fixed, which carries at one end a horizontalstud c, upon which the hand-wheel d of the machine turns, and on one ofits sides a stud e, upon which a bell-crank lever f g h turns. Themovement of this bell-crank lever is effected by the handwheel d, whichhas an eccentric groove t' on its inner face, into which the end of thearm h of the said lever fits and causes one of the other arms f, whichis horizontal, to drive the needle-bar and needle lc up and down intheusual way, while the third arm g, which projects vertically down,actuates the feeder-bar m. The feeder-bar m Works at right angles to themovement of the feeder proper and has three inclined bearing-faces n op, the function of which will hereinafter be described. The feederproper, q, is held down by its own weight or also'loy a spring r, and itoscillates about a pin s, shown square in the drawings, on which it isguided by a check t. Through a square opening u at its upper end passesthe feeder-bar m, which is guided in a T-shaped slit@ in a fixed platew. By the direct connection of the needle 7c and feederbar m with thesame system of levers f g both reach 'their extreme positions at thesame time, the feeder-bar `beingmoved forward when the needleis raised,Fig. 2, while in the lowest position of the needle the feeder is drawnback. When the needle is atits highest point, Fig. 2, the inclined facepof the feederbar has just moved the raised feeder forward and hasthereby moved forward the material by the length of one stitch. dle nowgoes down, Fig. 3, the feeder-bar is at the same time drawn back untilthe second inclined face enters the opening u in the feeder, whereuponthe latter in its forward position goes down under the action of thespring r or by its own weight. movement of the feeder then takes placeso long as the third inclined facen does not enter the square opening toin the feeder. Before the needle has reached its lowest position, Fig.4, the inclined face n draws the feeder .back so as to occupy theposition shown in Fig. 4, the feeder-bar being then in itsfarthest-backposition. When finally the needle moves up, Fig. 5, thefeeder-bar goes forward again and the face o raises the feeder sothatits teeth catch in the material to be sewed in order to move thelatter forward through thelength of one stitch. The movement of the.feeder in the sides of the rectangular hole is therefore effected by asingle feeder-bar, which is only rendered possible because the twoinclined faces u and p, which' impart to the feeder the movement in ahorizontal direction, are so arranged upon' the feed-bar that they allowthe feeder to remain at rest for a time before it is pushed inthefopposite direction. Between the two movements the up or downmovement takes place each time owing to the action of the third inclinedface o, which is arranged upon the feeder-bar between the two inclinedfaces n and p in the longitudinal direction. pivoted at its right-handend to the lower No backward When the nee- The pointed looper-barlisalso end of the arm g of the bell crank-lever, eX-

IOO

elements are claimed specilcallyin my pending application, Serial No.85,238, filed December 9, 1901.

What I claim as my invention, and desire to secure by Letters Patent,is-

l. A sewing-machine feed comprising, the feed-dog provided with anopening, of a horizontally-reciprocating feed-bar projecting at its freeend through said opening, provided at opposite sides withoppositely-inclined faces to impart longitudinal reciprocation to thefeed-dog and also provided on its upper side with a third inclined faceto raise the feed-dog against the goods, and means for effecting thelowering of the feed-dog; substantially as described.

2. The combination with the feed-dog having a depending shank looselypivoted at its lower end and provided tvhereabove with an opening, of ahorizontally-operating feedbar, projecting at its free end through saidfeed-dog opening, provided at opposite sides with oppositely-inclinedfaces to oscillate the dog back and forth and also provided on its upperside with a third inclined face to raise the feed-dog to the Work;substantially as described.

3. The combination with the bellcrank lever and means for operating it,of a needlebar connected to the horizontal arm of said lever, anoscillating feed-dog having an open-l there provided on its oppositeside with two oppositely-inclined faces to oscillate the feeddog backand forth, and also provided on its upper side with a third incline toraise the feed-dog to the goods; substantially as described.

4. A sewing-machine comprising the bellcrank lever, means for operatingthe lever, the needle-bar pivoted to the horizontal arm of the lever, ahorizontal pointed looper-bar pivoted to the depending arm of said leverfor reciprocation thereby, a loosely-pivoted oscillatingfeed-dog, havingan opening therethrough, and a horizontal feed-bar also pivoted to thedepending arm of the said lever, with its free end passed through thefeed-dog opening and there provided with three inclined faces to impartpositive movement in three directions to the feed-dog; substantially asdescribed.

In testimony whereof I have signed my name to this specification in thepresence of tWo subscribing Witnesses.

CARL FORSTER.

Witnesses:

FRANK-W. MAHIN, FRANZ SIMON.

